Rick, I had to do this for XP 32bit machines, over 40 so far worked well.
I believe I have seen scripts to help work with or disable UAC. But check to see if that registry exists as other scripts I checked on this board didnt work for me.
To get around UAC, you need to run as SYSTEM and not the user.
To dissable UAC on windows 7 run this step in a procedure:
Set Registry Value
change value to 0
the data type is REG_DWORD
*****This does not take affect until the computer is rebooted******
After a bit of testing, I wanted to follow-up with some of my gripes about SEPprep:
1. The reboots are not configurable. In other words, the application will reboot without asking (in unattended mode).
2. SEPprep is basically a universal uninstaller. However, if your uninstalls were failing due to a corrupt uninstaller, they will still fail with SEPprep.
3. There is a way to configure different uninstall switches, but not per product. It only gives you one line to set custom switches.
for the reboot: that is configurable. Its one of the things in the .ini file. Did you download the SEPprep manual? it outlines how to use the tool